Migrate Casino Application Environments with Zero Downtime

Situation

A casino manages all aspects of its business (gaming, hotel operations, restaurants, etc.) on HPE NonStop systems. As part of a major upgrade, the casino developed several new applications, restructured its databases, and changed the schema of the Enscribe files and SQL tables.

Problem

The casino needed to implement the new applications and database formats in a new platform environment. The casino required 24/7 application availability and could not accept a moment of downtime during the migration.

Solution

  • Use HPE Shadowbase Zero Downtime Migration (ZDM) to create, synchronize, and test the new application and database environment
  • Migrate users to the new environment while keeping the old and new environments in-sync with application services available while the migration takes place
Diagram of HPE Shadowbase ZDM architecture: Users are connected to a primary NonStop Server running the current application, connected to an Enscribe and SQL database, with the transaction changes being picked up by Shadowbase from the audit trail, and replicated to a backup NonStop server. To perform the ZDM, first, setup the new databases on the future production system. Second, set up Shadowbase replication from the current production system to Shadowbase on the future production system (and ensure the transactions are appearing in the new database). Third, bring up the new application and thoroughly test it to ensure transactional consistency (Shadowbase Compare is an excellent product for this verification step). Fourth, disconnect the users from old application on the old production system, then connect them to the new application on the new production system, and use Shadowbase to failback to the old production system if necessary.

Figure 1 — HPE Shadowbase Zero Downtime Migration (ZDM) Architecture

Outcomes

  • Maintained revenue and ensured zero loss of service during the upgrade
  • Avoided a high risk “big-bang” approach, scaling up the new environment’s load over time (see steps 1-4)

HPE Shadowbase Products of Interest

  • HPE NonStop Shadowbase Basic Data Replication (SKU BE441AC)
  • HPE NonStop Shadowbase Advanced Data Replication (SKU BE442AL)
  • HPE NonStop Shadowbase Compare (SKU BE445AC)

Contact us or your HPE Shadowbase representative, and learn how Shadowbase software will benefit you.

Related Case Study:

Related White Paper:

Related Solution Briefs: